Nature"The Loneliest Animals"
Scientists work feverishly to breed some of the world's most endangered species in high-security high-tech labs and investigate what forces have led to the demise of entire species. Featured animals include Yangtze turtles, a baby Sumatran rhino, a special collection of lemurs, the Spix's macaw, and a giant tortoise from the Galapagos, the last known specimen of his kind.G

8:00 pm

NOVA"Smartest Machine On Earth"
This film profiles Watson, an IBM supercomputer, which competed against two "Jeopardy!" champions to prove its ability to mimic the human thought process. The film goes behind the scenes at IBM to provide a firsthand look at the technological feats and hurdles to develop Watson and the challenges artificial intelligence (AI) researchers face.G

9:00 pm

Secrets of the Dead"The World's Biggest Bomb"
Beginning in the 1950s, American and Soviet scientists engage in a dangerous race to see who can build and detonate the world's largest bomb. Bomb-makers on both sides are flying blind as they push technology into unknown territory.G

10:00 pm

How Long Is A Piece of String
It sounds like a simple question. But as comedian Alan Davies discovers, finding the answer involves a journey through mathematics, physics and quantum mechanics via the fundamental nature of the universe.G